Integrated Access and Backhaul in Fixed Wireless Access Systems

Hashemi, Mona; Coldrey, Mikael; Johansson, Martin; Petersson, Sven O.

doi:10.1109/vtcfall.2017.8288233

Cited by 16 publications

(19 citation statements)

References 4 publications

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“…They analyzed (via simulations) some important characteristics of the FWA environment such as the required cell density, i.e., to provide the expected data rate, and the optical technology options for the FWA transport network implementation. In a scenario where a limited number of wireless access points have fiber backhaul, the authors in [14] investigated the advantages of using an access-integrated wireless backhaul in a FWA network, i.e., when the backhaul network shares the radio resources with the FWA. Their analysis suggests that in such a scenario data rates of up to 40 Mbps can be achieved when access-integrated wireless backhaul is used in conjunction with fiber backhaul.…”

Section: G Fwa Network Architectures and Various X-haul Optionsmentioning

confidence: 99%

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Optical Transport Network Design for 5G Fixed Wireless Access

Ranaweera

Monti

Skubic

et al. 2019

J. Lightwave Technol.

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The fifth generation of mobile technology, 5G is anticipated to be a significant leap in the evolution of mobile communication. 5G will be designed to attain 1000 times higher data volumes, 10 times lower latency, and 100 times more connected devices than its predecessor, 4G. Due to 5Gs ability to sustain high bandwidth per unit area, 5G is considered to be a cost-efficient solution to provide Fixed Wireless Access (FWA) to households on a large scale. FWA is seen as an attractive alternative for fixed broadband access in scenarios where last mile access based on wired technologies is not economically viable. Whilst approaches for enhancing user experience in a 5G FWA environment are investigated in the research community, the problem of providing cost-effective high capacity transport for FWA deployments still remains a major challenge. This is particularly challenging due to diverse transport network architectures and requirements imposed by different 5G deployment models. This paper addresses this problem by formulating a generalized joint-optimization framework to simultaneously plan wireless access and optical transport for 5G FWA networks in order to minimize the deployment cost whilst meeting various network requirements. We demonstrate the applicability of the proposed framework by applying it to a real scenario with a range of deployment options and where different types of optical x-haul solutions are considered. The results provide a cornerstone for deployment strategies that will be imperative for realizing a future-proof and cost-effective broadband access network.

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Section: G Fwa Network Architectures and Various X-haul Optionsmentioning

confidence: 99%

“…Each OLT line card supports only n p number of PONs and this requirement is captured by Eqs. (14) and (15).…”

Section: ) Line Card Selection At the Comentioning

confidence: 99%

Optical Transport Network Design for 5G Fixed Wireless Access

Ranaweera

Monti

Skubic

et al. 2019

J. Lightwave Technol.

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“…Also, [23] provides useful insights for IAB deployments, especially, related to network densification and multi-hop topology, as it simulates a multi-hop mmWave picocell network, and evaluates the user throughput. The potential of using IAB in a fixed wireless access use-case is evaluated in [24]. The impact of dynamic time division duplex (TDD)based resource allocation on the throughput of IAB networks, how its performance compares with static TDD and FDD (F: frequency), is discussed in [25], [26].…”

Section: Introductionmentioning

confidence: 99%

On Integrated Access and Backhaul Networks: Current Status and Potentials

Madapatha

Makki

Fang

et al. 2020

IEEE Open J. Commun. Soc.

100

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In this paper, we introduce and study the potentials and challenges of integrated access and backhaul (IAB) as one of the promising techniques for evolving 5G networks. We study IAB networks from different perspectives. We summarize the recent Rel-16 as well as the upcoming Rel-17 3GPP discussions on IAB, and highlight the main IAB-specific agreements on different protocol layers. Also, concentrating on millimeter wave-based communications, we evaluate the performance of IAB networks in both dense and suburban areas. Using a finite stochastic geometry model, with random distributions of IAB nodes as well as user equipments (UEs) in a finite region, we study the service coverage rate defined as the probability of the event that the UEs' minimum rate requirements are satisfied. We present comparisons between IAB and hybrid IAB/fiber-backhauled networks where a part or all of the small base stations are fiber-connected. Finally, we study the robustness of IAB networks to weather and various deployment conditions and verify their effects, such as blockage, tree foliage, rain as well as antenna height/gain on the coverage rate of IAB setups, as the key differences between the fiber-connected and IAB networks. As we show, IAB is an attractive approach to enable the network densification required by 5G and beyond.

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“…(c) Higher system reliability and quicker round trip times are to be available in transportation systems and industrial process control. To fulfill these requirements, a combination of various new techniques such as massive multiple input multiple output (MMIMO), dense small cells, cooperative communications such as device-to-device (D2D) and coordinated multipoint (CoMP), advanced air interface, additional spectrum at higher frequencies (mm-wave), and integrated access and backhaul (IAB) are needed [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…It is expected in the 5G era, a powerful fiber backhaul is available at least for macro-cells in CRAN architecture. Such deployment can inherently provide a low-latency and high-capacity backhaul needed for JT-CoMP, while connections of small-cells might be ranging from fiber to various relaying and IAB approaches, which have lower capacity but might be more cost-effective [3,5].…”

Section: Introductionmentioning

confidence: 99%

MSE Minimized Joint Transmission in Coordinated MultiPoint Systems with Sparse Feedback and Constrained Backhaul Requirements

Nezafati¹,

Taki²,

Svensson

2020

Preprint

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In a joint transmission coordinated multipoint (JT-CoMP) system, a shared spectrum is utilized by all neighbor cells. In the downlink, a group of base stations (BSs) coordinately transmit the users’ data to avoid serious interference at the users in the boundary of the cells, thus substantially improving area fairness. However, this comes at the cost of high feedback and backhaul load; In a frequency division duplex (FDD) system, all users at the cell boundaries have to collect and send feedback of the downlink channel state information (CSI). In centralized JT-CoMP, although with capabilities for perfect coordination, a central coordination node (CCN) have to send the computed precoding weights and corresponding data to all cells which can overwhelm the backhaul resources. In this paper, we design a JT-CoMP scheme, by which the sum of the mean square error (MSE) at the boundary users is minimized, while feedback and backhaul loads are constrained and the load is balanced between BSs. Our design is based on the singular value decomposition (SVD) of CSI matrix and optimization of a binary link selection matrix to provide sparse feedback - constrained backhaul link. For comparison, we adopt the previously presented schemes for feedback and backhaul reduction in the physical layer. Extensive numerical evaluations show that the proposed scheme can reduce the MSE with at least 25% , compared to the adopted and existing schemes.

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Integrated Access and Backhaul in Fixed Wireless Access Systems

Cited by 16 publications

References 4 publications

Optical Transport Network Design for 5G Fixed Wireless Access

Optical Transport Network Design for 5G Fixed Wireless Access

On Integrated Access and Backhaul Networks: Current Status and Potentials

MSE Minimized Joint Transmission in Coordinated MultiPoint Systems with Sparse Feedback and Constrained Backhaul Requirements

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